Internal-combustion engine



July 3,1923. I v 1.460.728 E. E. NELDNER INTERNAL COMBUSTION ENGINE Filed July 15. 1922 2 Sheets-Sheet 1 EflwaPdLNEIdnEF Patented July 3, 1923,

nnwnan n. NELDNER, or ivrfnw nuxna wrs'coivsin. Q

1' INTERNAL-COMBUSTION Ff Application filed .TuIy 15,

To all whom it may concern Be itknown that I, EDWARD E. NELDNER, a citizen of the United States, and resident of. Milwaukee, in the county of Milwaukee ,and State of Wisconsimhave invented certain new and usefullmprovements in Internal-Combustion Engines; and I. do hereby declare that the following is a full, clear, and exact description thereof. Y

My invention relates to a new and useful improvement in connection with internal combustion engines, and more particularly to the mechanism by means of which the reciprocating .motion of the pistons is trans-= mitted and converted into the rotarymotion of the power shaft.

In engines of the more common type, wherein the piston rod is connectedvdlrectly to the crank shaft,'the pistonvrod is comparatively short with respect to the throwof the crank shaft and the resultingside thrust on the piston results in excessive and unequal wear on thesame, thus materially, lessening the life ofthe engine.

It is the primary object of my invention to construct, a practical and efiicient engine wherein the impulses of, the pistons" are transmitted through the piston rod in a A comparatively straight line to theends o-f-a walking beam which carries a yoke which,

has a slot receiving the'wrist pin and transmitting motion through the same-to the power shaft.

A more speclfic object of theinvention is to provide improved means for guiding the j wrist pin in the yoke, whereby GXCBSSlVB wear on the latter will be effectively prevented.

With the above and other objects in view, which will be apparent from the following description, the invention consists in certain structural details which will be specifically described in connection with the accompanying drawings, and subsequently claimed.

In the drawings, 7 Figure 1 is a vertical longitudinal view of my invention partly in section and partly in elevation.

Figure 2 is a view similar to Figure 1 but on a plane at right angles thereto;

Figures 3 and 4: are detailed views of parts of the invention.

Referring more specifically to the drawings, the device comprises a casing'5 having bearings 6 inwhich is journalled the power shaft 7. A combined fly-wheel and crank 1922. Serialli'o; 5 75,3591

from one. or more, walking beams 9,,which,

ders ofv the engine.

in turn, derive theiripower from the by ine di 8. sa as l i r' h t'f x 1S driven by means,hereinafter,described,-

he preferred h i en t,

illustratedin the, drawings, there are two 1 walking beams and: four cylinders,', but it.

o varied. Each'of the. walking beams is sewill be obvious ithatv the in lmberi may be cured S e 1 Whichis. journalled on a shaft 11 and each end of 1 the walking.

beamis pivotally connectedto 'a piston rod I 12 which is connected with a head flc recip rocably; mounted in a cylinder 1 4.

providing a; path for the shaft Tastlre yoke with ahead consistingof two branches 18 and 1 9 oppositely disposed flat? 1,655, 31 whichlare 'guided.infthe slot 2O- vvhichI eX tends radiallygofthe yoke and intersects the,

slot lGiat} right angles;

It'will mieistoodthar as; the, ta e sions take place successively the" different,

cylinders, the walking tea'nisandfyokswil as Secured to the sleeve10is a yoke 15,,which i scribedabout'the center of the shaft 11,.and. 1

is oscillated about itsaxisl wrist pin17-f is ournalled in the WheelB, and is,p rovided be' oscillated about thei rakes, and; the wrist,

pin vwill be revolved 'tlieijebyabout the '1' shaft 7. 'During this movement, the'wrist pin head will travel from the position shown" in Figure '2 downwarcuy in theslot 'goa i i l d across theislo t 1 6. v Intheabsenc'e dr'any guiding means, it has been foundftliat' thef edges of, the. Wrist plat au are ili'ablejtol deviate from'a straight liiiein'cro'ssing the slot 16, andfhis results in a knocking and wearing on the corners wherethe slots inter-.-

sect.

For the purpose of guiding the wrist pin head, therefore, I have provided a pair of fiat blocks 21 and 22 embracing the'shaft 7 and held in the slot 16 by means of a pairv of symmetrical arms 23 and 24 which are journalled on the shaft 11 by-means of a split bearing 25, and are resiliently held together by means of the spring devices 26; In passing, therefore, from the position shown in Figure 2 to the position shownflin 1' Figure 3, the wrist pin head will straddle the block 21, the head being cutaway at 27 to permit the vready engagement therewith as the wrist pin continues to travel in its circular path about the shaft 7 its head will ride aeros'sthefslot 1'6, being guided by the block 21'which "is forced outwardly from the shaft 7 in opposition to the spring device In completing its revolution, the wrist *pln will pass upwardly'on the other side of the shaft 7 and will be guided across the slot by the guide 22, the opposite corner of the head being cut away, as shown at 28, to permit the ready engagement with the block.

,Tt'will be seenthatfin theeperjafidn f impasse, engine, the ends of the walking beams will travel in comparatively short arcs which aretangehtial to the axes 'of'the cylinders. llhe angular movement of the piston rods therefore, is very I small, and there will he very "little side thrust against the 'cylinders. The slight wear which 'does occur,- will be distributed uniformly about cure'd thereto, a wrist pin carried by the drive member, a walking beam amounted on an axis parallel to said-shaft'andhav ing a yokeprovided with an arcuate slot in which said shaft' rides when the walking beam is .os'cil lated, andafradial slot in which said wrist pin is guided about the shaft, and a pair of pistons "operable, to oscillate said beam. I I

2, "In, a device of the character, described,

a rotatablefs'haft having a' drive member se cur-ed theretoga wrist-pin journalled inthe r e mem e nd h vi g a, h w PP sitely dispdsed flat faces, a "walking beam mounted to rockabout an axis parallel to said shaft,'a yoke secured to the beam and having a radial slot for receiving and guiding the wrist pin head as it revolves about said shaft, an arcuate slot intersecting said radial slot and-receiving said shaft, means for rocking said beam and yoke, and fiat yieldably held blocks for engaging the fiat faces of the wrist pin head to guide the same across said arcuate slot. v

3. In a device of the characterjdescribed, a rotatable shaft having adriv'e member secured thereto, a wrist-pin mounted in the drive -member,a yoke mounted for oscillation about an axis parallel. to'said shaft, a

driving connection between the yoke and wrist-pin including a radially disposed'slot in said yoke which receives the ,wrist pin to guide the same in its revolutionjabout the shaft, said yoke having also an arcuate slotintersectuig the radial slot at right angles and through which 'the shaft-extends, means for guiding the wrist-pin as it moves across the arcuate-slot to prevent the same from striking the corners at the intersection of the slots.

4:.In a device of the character described, a rotatable shafthaving a drive member secured thereto, a wrist-pin journalled in the drive memberand having ahead with 0ppositely disposed fiat faces, means for rotat ing the drive member including an oscillating yoke having a radial slot receiving said wrist-P nhead and an arcuate slot intersecting said radial slot andthroughwhich the shaft extends, and a pair'of'fiat blocks an said arcuate slot embracing saidshaft and held resiliently against the same, said'blocks being engageable by the wrist-pin head to guide the'latter as it travels across thea'rcua'te slot. y

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee, in the countyv of 'Milwaukee and State of Wisconsin,

EDWARD E. NELDNER. N 

